Oil filter



July 23, 1940. B. voN PEN-rz OIL FILTER FiledNov. 22. 1938 .www h l wwwmwwm lNvENToR Patented July z3, 1940 UNITED STATES PATENT ori-ICE Benjamin von rgi'sljem, Lofi; mma,

1 Claim.

rIhis invention relates to oil'ifllters and has for an vobject to provide a construction which is an improvement over my prior Patent No. 2,093,877.

Another object of the invention is to provide an oil iilter for use on automobile engines and similar engines wherein the lter is formed to quickly remove large particles of dirt and then remove the smaller impurities in the oil, including water, gasoline, and the like.

A further object of the invention is to provide an oil filter havingfiltering mediums arranged to remove certain impurities in a mechanical way and other impurities, as for instance acids, in a chemical way, whereby the cleaned oil may be restored to substantially its original condition.

Additional and more specic objects of the invention are to provide an oil illter capable of being used with an automobile engine wherein the oil is ltered under some pressure and with appreciable rapidity.

In the accompanying drawing- Fig. 1 is a longitudinal vertical sectional view through an oil illter disclosing an embodiment of the invention;

Fig. 2 is a transverse sectional view through Fig. 1, approximately on the line 2 2;

Fig. 3 is a plan view of the principal filtering element illustrated in Fig. 1 with certain parts removed;

Fig. 4 is a perspective view of a textile fabric tube embodying certain features of the invention.

Referring to the accompanying drawing by numerals, I indicates a metal casing which is tubular and which is closed at both ends. Preferably the parts are so arranged that the dirty oil will pass into the device through the inlet pipe 2 and the clean oil pass out through the outlet pipe 3.

Arranged in the casing I is a filter l, which is preferably held by friction centrally of the casing so that there will be a lower chamber Ii and an upper chamber 6. As the oil enters under some pressure it fills the lower chamber 5 and then passes upwardly through the filter l and iills up the chamber 6, from which it passes to a desired point through the outlet pipe 3. When the device is connected with an automobile engine preferably there is a continuous circulation of the oil through the device. The lter l is made flat and then coiled into the shape shown in Figs. 1 and 2. During this operation an outer textile fabric bag is positioned to surround and form the outside of the filter while a portion of the bag extends through the center of the lter from top to bottom.

fuller's earth 8 or similar material that will assist in' neutralizing the -acid in the oil being ltered. On top of the sheet of paper 1 there is provided a layer 9 of filtering medium, as for instance waste cotton or other filtering liber in a more or less loose state. The layer 3 preferably extends a short distance on each sidev of the paper 1 and is supported by a number of supporting members I0 which are preferably formed from metal and are zigzag or serpentine in shape, as illustrated particularly in Fig. 3. Preferably these supports I0 arel slightly less in length than the width. of the paper 1. After the desired length of paper has been provided and the members 3 and I0 applied thereto, a textile fabric bag II is arranged as shown by the dotand-dash lines I2 in Fig. 3. 'I'he textile bag II is then hunched together or collapsed transversely and placed in the position indicated by the numeral I2 in Fig. 3. 'lhe paper 1 and the layer 3 are then moved around the bag when in this collapsed condition until a complete coil or winding is provided, as indicated in Fig. 2. After this has been done, theprotruding part of the Abag II is brought around and telescoped over as shown in Fig. l, and, consequently, the oil isacted upon by the filtering mediums 'and the fullers earth 8, so that when the oil eventually escapes into chamber 6 it will be puried and cleansed ready for further use. The filtering device may be used continuously until the filtering mediums become exhausted or filled with foreign matter and then the entire iiltering structure l 4 is removed and a new one provided.

It will be noted that the oil must first pass through the textile fabric bag II at th'e'bottom and then through the extending portion of the fiber layer 9. After passing through these two layers the oil passes upwardly between the 'various layers of paper and through the fibrous material adjacent thereto so that it is discharged into the zone I5 at the top and from this zone the oil pm usi:` th'etop part 0f the bag being formed-trom a single lmetalrod formed Hainto chamber l. zigzag for its i'ull length and projectingfrom 1-claim: near one edge of the fibrous material to the Amtering member for a filter of the character other, said brous strip and said strip of paper described, comprising a stripoi' paper impregbeing formed as a coil, and a tbular textile i'ab- 5 nated with fuller-s earth,l a strip oi' fibrous maric member having one section extending through terialarranged against one surface of said paper the center of the coil and the other section andv projecting beyond the edges thereof, a pluextending across the bottom and over the sides r rality of spaced bracing members coacting with and top of the co l0 said iibrous strip, each of said bracingv members BENJAMIN VON PENTZ. 10. 

